This circuit, found in a 1964 US documentation, consists of a selective amplifier that lets only 10 Hz pass around a 400 Hz center frequency with the indicated components.
Found in a1968’s Burr Brown documentation, this shield uses an integrated circuit from that time,...
We found this circuit in the October 1994 issue of Electronics Now magazine. The circuit uses a...
This circuit was found in Motorola's 1966 documentation. HEP556-type integrated circuits can be...